David Hresil, 18, was walking when neighbors say a red Toyota car and a green Chrysler minivan stopped. The people inside reportedly got out and opened fire.
Hresil's family says the high school senior was a good student and always stayed out of trouble.
"He was quiet, shy. He was funny. He is going to be missed so much," said Linda Hresil, the victim's sister.
"He was a brother. He was a son. The bad thing about it is someone took a life away that made a difference. Their bullets? It just took it all away - and it's unfair," said Teri Costantino, relative.
The family plans to hold a candlelight vigil at 60th and Springfield on Friday night at 6 p.m.
Police have made no arrests in the case.